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   <div id="projectname">Dinic
   &#160;<span id="projectnumber">1.0</span>
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   <div id="projectbrief">Documentacion de la API de DINIC para la cátedra de Matemática Discreta II.</div>
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<div class="title">_lexer.c</div>  </div>
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<a href="__lexer_8c.html">Ir a la documentación de este archivo.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="__lexer_8h.html">_lexer.h</a>&quot;</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;</div>
<div class="line"><a name="l00007"></a><span class="lineno"><a class="line" href="struct__lexer__t.html">    7</a></span>&#160;<span class="keyword">struct </span><a class="code" href="struct__lexer__t.html">_lexer_t</a> {</div>
<div class="line"><a name="l00008"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#abfae665d56d61e1c21831bec369abd34">    8</a></span>&#160;    FILE *<a class="code" href="struct__lexer__t.html#abfae665d56d61e1c21831bec369abd34">input</a>;<span class="comment">/* Cinta de entrada. Archivo y caracter actual */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#ab04e2d55ea4a544f3575812582af7b51">    9</a></span>&#160;    <span class="keywordtype">int</span> <a class="code" href="struct__lexer__t.html#ab04e2d55ea4a544f3575812582af7b51">current</a>;</div>
<div class="line"><a name="l00010"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#a849ff3334b6f77aa2862003ca39103fe">   10</a></span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="struct__lexer__t.html#a849ff3334b6f77aa2862003ca39103fe">has_current</a>; <span class="comment">/* True cuando `current&#39; tiene un caracter preleido */</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#ab826cc29e39301e5c610eb5c04b5308c">   11</a></span>&#160;    bstring <a class="code" href="struct__lexer__t.html#ab826cc29e39301e5c610eb5c04b5308c">item</a>;<span class="comment">/* Token siendo leído */</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#af07abc05ef1b96a95f29b4551006af48">   12</a></span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="struct__lexer__t.html#af07abc05ef1b96a95f29b4551006af48">own_item</a>; <span class="comment">/* true cuando el lexer es dueño de la referencia item */</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="struct__lexer__t.html#a4f8b893603bd3b5d0bd0d6378f07976c">   13</a></span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="struct__lexer__t.html#a4f8b893603bd3b5d0bd0d6378f07976c">is_started</a>, <a class="code" href="struct__lexer__t.html#ad06bfb60b8c161a565a740f59c8ed846">is_off</a>;<span class="comment">/* Indicadores de estado */</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;};</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">/*** Internas ***/</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="__lexer_8c.html#a0a8c93409988f507215933a6c37a9caa">   18</a></span>&#160;<span class="preprocessor">#define BASE_ALLOC 16</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="__lexer_8c.html#ac29f752bb184c9e4edbef38b8614d01d">   20</a></span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#ac29f752bb184c9e4edbef38b8614d01d">lexer_accept</a> (Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    assert (!<a class="code" href="__lexer_8c.html#aef5130d55b06d8a9e22a76dab34df192">lexer_is_off</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;    assert (self-&gt;has_current);</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    <a class="code" href="____bstrlib_8c.html#ab21dd77c743df60a682a720a8b981f24">bconchar</a>(self-&gt;item, self-&gt;current);</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <span class="comment">/* Leer */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keyword">self</span>-&gt;current = fgetc (self-&gt;input);</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    assert (self-&gt;has_current); <span class="comment">/* Esta función mantiene esto invariante */</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;}</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">   33</a></span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">lexer_lookahead</a> (Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    assert (!<a class="code" href="__lexer_8c.html#aef5130d55b06d8a9e22a76dab34df192">lexer_is_off</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    </div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keywordflow">if</span> (! self-&gt;has_current) {</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;        <span class="comment">/* Leer */</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;        <span class="keyword">self</span>-&gt;current = fgetc (self-&gt;input);</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keyword">self</span>-&gt;has_current = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    }</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    assert (self-&gt;has_current); <span class="comment">/* Esta función asegura esto siempre */</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;}</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">   47</a></span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    </div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keywordflow">if</span> (self-&gt;own_item) {</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;        <a class="code" href="____bstrlib_8c.html#a840ac32e58f2a82fbf11995caad4ef12">btrunc</a> (self-&gt;item, 0);</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        <span class="comment">/* No liberamos self-&gt;item, alguien más es dueño del puntero. */</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        <span class="keyword">self</span>-&gt;item = <a class="code" href="____bstrlib_8c.html#ab505e4ece683c289cc40bc271a7c7819">bfromcstralloc</a> (<a class="code" href="__lexer_8c.html#a0a8c93409988f507215933a6c37a9caa">BASE_ALLOC</a>, <span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    }</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keyword">self</span>-&gt;own_item = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;}</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment">/*** Inicialización y destrucción ***/</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="__lexer_8h.html#aab02b4d1aa9740ac7a34420b4b9bbd6d">   61</a></span>&#160;Lexer *<a class="code" href="__lexer_8c.html#aab02b4d1aa9740ac7a34420b4b9bbd6d">lexer_new</a> (FILE *f) {</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="comment">/* Nuevo lexer, leyendo de `f&#39; */</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    Lexer *result = NULL;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    assert (f != NULL);</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    </div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    result = calloc (1, <span class="keyword">sizeof</span> (*result));</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    assert (result != NULL);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    </div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    result-&gt;input      = f;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    result-&gt;current    = EOF;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    result-&gt;has_current= <span class="keyword">false</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    result-&gt;item       = <a class="code" href="____bstrlib_8c.html#ab505e4ece683c289cc40bc271a7c7819">bfromcstralloc</a> (<a class="code" href="__lexer_8c.html#a0a8c93409988f507215933a6c37a9caa">BASE_ALLOC</a>, <span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    result-&gt;own_item   = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    result-&gt;is_off     = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    result-&gt;is_started = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;}</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="__lexer_8h.html#a12aff8e140d703e68362dc301a3ade01">   81</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a12aff8e140d703e68362dc301a3ade01">lexer_destroy</a> (Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="comment">/* Destruye `self&#39;, liberando recursos asociados. No cierra el archivo */</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keywordflow">if</span> (self-&gt;own_item)</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        <a class="code" href="____bstrlib_8c.html#abebe200396d233cc3b732677e17f1087">bdestroy</a> (self-&gt;item);</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    free (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;}</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="comment">/*** Consultas ***/</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="__lexer_8h.html#a26f8b93963415d431d3e4e90aaf4a098">   92</a></span>&#160;bstring <a class="code" href="__lexer_8c.html#a26f8b93963415d431d3e4e90aaf4a098">lexer_item</a> (Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    <span class="comment">/* Última cadena leída por `self&#39;. El puntero devuelto debe ser liberado</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="comment">     * por el llamador. </span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    bstring result = NULL;</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    assert (!<a class="code" href="__lexer_8c.html#aef5130d55b06d8a9e22a76dab34df192">lexer_is_off</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    assert (<a class="code" href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keyword">self</span>-&gt;own_item = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    result = <span class="keyword">self</span>-&gt;item;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="comment">/* Postcondiciones*/</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    assert (result != NULL);</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;}</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div>
<div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="__lexer_8h.html#ac4bb4b844cd11e0b36321040e45ddb27">  111</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a> (<span class="keyword">const</span> Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    <span class="comment">/* `self&#39; empezó a leer el archivo? */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">self</span>-&gt;is_started;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;}</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="__lexer_8h.html#aef5130d55b06d8a9e22a76dab34df192">  119</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="__lexer_8c.html#aef5130d55b06d8a9e22a76dab34df192">lexer_is_off</a> (<span class="keyword">const</span> Lexer *<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="comment">/* `self&#39; terminó de leer el archivo? */</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">self</span>-&gt;is_off;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;}</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment">/*** Operaciones ***/</span></div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="__lexer_8h.html#a58cdcf051edb318e0642fd10e1d4f07a">  129</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a58cdcf051edb318e0642fd10e1d4f07a">lexer_next</a> (Lexer *<span class="keyword">self</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *charset) {</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="comment">/* Lee con `self&#39; caracteres pertenecientes a `charset&#39;, tantos como sea</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="comment">     *  posible. Deja el resultado accesible en lexer_item (self)</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    assert (charset != NULL);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <a class="code" href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">lexer_lookahead</a>(<span class="keyword">self</span>);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="keywordflow">while</span> (self-&gt;current != EOF &amp;&amp; strchr (charset, self-&gt;current)) {</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;        <a class="code" href="__lexer_8c.html#ac29f752bb184c9e4edbef38b8614d01d">lexer_accept</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    }</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keyword">self</span>-&gt;is_started = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    assert (self-&gt;has_current);</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    <span class="keyword">self</span>-&gt;is_off = (<span class="keyword">self</span>-&gt;current==EOF &amp;&amp; <a class="code" href="____bstrlib_8h.html#a462176ab60e31a2ead1b575b50b1124d">blength</a> (self-&gt;item)==0);</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    <span class="comment">/* Postcondiciones */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    assert (<a class="code" href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;}</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="line" href="__lexer_8h.html#ad3c560130b4f7c71490ce797ed36e578">  149</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#ad3c560130b4f7c71490ce797ed36e578">lexer_next_to</a> (Lexer *<span class="keyword">self</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *charset) {</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="comment">/* Lee con `self&#39; caracteres no pertenecientes a `charset&#39;, tantos como sea</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;<span class="comment">     *  posible. Deja el resultado accesible en lexer_item (self)</span></div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    <span class="comment">/* Precondiciones */</span></div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    assert (charset != NULL);</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;    <a class="code" href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">lexer_lookahead</a>(<span class="keyword">self</span>);</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    <span class="keywordflow">while</span> (self-&gt;current != EOF &amp;&amp; !strchr (charset, self-&gt;current)) {</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        <a class="code" href="__lexer_8c.html#ac29f752bb184c9e4edbef38b8614d01d">lexer_accept</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    }</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <span class="keyword">self</span>-&gt;is_started = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    assert (self-&gt;has_current);</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    <span class="keyword">self</span>-&gt;is_off = (<span class="keyword">self</span>-&gt;current==EOF &amp;&amp; <a class="code" href="____bstrlib_8h.html#a462176ab60e31a2ead1b575b50b1124d">blength</a> (self-&gt;item)==0);</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    <span class="comment">/* Postcondiciones */</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    assert (<a class="code" href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;}</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div>
<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="__lexer_8h.html#a11463cc517bb27d0b711d6a85f3e57ad">  170</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a11463cc517bb27d0b711d6a85f3e57ad">lexer_next_char</a> (Lexer *<span class="keyword">self</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *charset) {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    assert (<span class="keyword">self</span> != NULL);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    assert (charset != NULL);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    <a class="code" href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">lexer_lookahead</a>(<span class="keyword">self</span>);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordflow">if</span> (self-&gt;current != EOF &amp;&amp; strchr (charset, self-&gt;current)) {</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        <a class="code" href="____bstrlib_8c.html#ab21dd77c743df60a682a720a8b981f24">bconchar</a>(self-&gt;item, self-&gt;current);</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        <span class="keyword">self</span>-&gt;has_current = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    }</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <span class="keyword">self</span>-&gt;is_started = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    assert (<a class="code" href="____bstrlib_8h.html#a462176ab60e31a2ead1b575b50b1124d">blength</a> (self-&gt;item)!=0 || self-&gt;has_current);</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    <span class="keyword">self</span>-&gt;is_off = (<a class="code" href="____bstrlib_8h.html#a462176ab60e31a2ead1b575b50b1124d">blength</a> (self-&gt;item)==0 &amp;&amp; <span class="keyword">self</span>-&gt;current==EOF);</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    assert (<a class="code" href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a> (<span class="keyword">self</span>));</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;}</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="comment">/* Operaciones extra */</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"><a class="line" href="__lexer_8h.html#aeab3e8693f54ef46c91a8589f35a60d0">  189</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#aeab3e8693f54ef46c91a8589f35a60d0">lexer_skip</a> (Lexer *<span class="keyword">self</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *charset) {</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    <a class="code" href="__lexer_8c.html#a58cdcf051edb318e0642fd10e1d4f07a">lexer_next</a> (<span class="keyword">self</span>, charset);</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;}</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;</div>
<div class="line"><a name="l00194"></a><span class="lineno"><a class="line" href="__lexer_8h.html#a206000c56ea092f4a7f21696633d05a9">  194</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="__lexer_8c.html#a206000c56ea092f4a7f21696633d05a9">lexer_skip_to</a> (Lexer *<span class="keyword">self</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *charset) {</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;    <a class="code" href="__lexer_8c.html#ad3c560130b4f7c71490ce797ed36e578">lexer_next_to</a> (<span class="keyword">self</span>, charset);</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;    <a class="code" href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a> (<span class="keyword">self</span>);</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;}</div>
<div class="ttc" id="__lexer_8c_html_ac29f752bb184c9e4edbef38b8614d01d"><div class="ttname"><a href="__lexer_8c.html#ac29f752bb184c9e4edbef38b8614d01d">lexer_accept</a></div><div class="ttdeci">static void lexer_accept(Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00020">_lexer.c:20</a></div></div>
<div class="ttc" id="__lexer_8c_html_a26f8b93963415d431d3e4e90aaf4a098"><div class="ttname"><a href="__lexer_8c.html#a26f8b93963415d431d3e4e90aaf4a098">lexer_item</a></div><div class="ttdeci">bstring lexer_item(Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00092">_lexer.c:92</a></div></div>
<div class="ttc" id="__lexer_8c_html_a5d47a4c3159e0d2d8e34a7d72a07365c"><div class="ttname"><a href="__lexer_8c.html#a5d47a4c3159e0d2d8e34a7d72a07365c">lexer_lookahead</a></div><div class="ttdeci">static void lexer_lookahead(Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00033">_lexer.c:33</a></div></div>
<div class="ttc" id="struct__lexer__t_html_ad06bfb60b8c161a565a740f59c8ed846"><div class="ttname"><a href="struct__lexer__t.html#ad06bfb60b8c161a565a740f59c8ed846">_lexer_t::is_off</a></div><div class="ttdeci">bool is_off</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00013">_lexer.c:13</a></div></div>
<div class="ttc" id="____bstrlib_8h_html_a462176ab60e31a2ead1b575b50b1124d"><div class="ttname"><a href="____bstrlib_8h.html#a462176ab60e31a2ead1b575b50b1124d">blength</a></div><div class="ttdeci">#define blength(b)</div><div class="ttdef"><b>Definition:</b> <a href="____bstrlib_8h_source.html#l00198">__bstrlib.h:198</a></div></div>
<div class="ttc" id="struct__lexer__t_html_ab04e2d55ea4a544f3575812582af7b51"><div class="ttname"><a href="struct__lexer__t.html#ab04e2d55ea4a544f3575812582af7b51">_lexer_t::current</a></div><div class="ttdeci">int current</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00009">_lexer.c:9</a></div></div>
<div class="ttc" id="struct__lexer__t_html_af07abc05ef1b96a95f29b4551006af48"><div class="ttname"><a href="struct__lexer__t.html#af07abc05ef1b96a95f29b4551006af48">_lexer_t::own_item</a></div><div class="ttdeci">bool own_item</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00012">_lexer.c:12</a></div></div>
<div class="ttc" id="__lexer_8c_html_aab02b4d1aa9740ac7a34420b4b9bbd6d"><div class="ttname"><a href="__lexer_8c.html#aab02b4d1aa9740ac7a34420b4b9bbd6d">lexer_new</a></div><div class="ttdeci">Lexer * lexer_new(FILE *f)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00061">_lexer.c:61</a></div></div>
<div class="ttc" id="__lexer_8c_html_a0a8c93409988f507215933a6c37a9caa"><div class="ttname"><a href="__lexer_8c.html#a0a8c93409988f507215933a6c37a9caa">BASE_ALLOC</a></div><div class="ttdeci">#define BASE_ALLOC</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00018">_lexer.c:18</a></div></div>
<div class="ttc" id="__lexer_8c_html_aeab3e8693f54ef46c91a8589f35a60d0"><div class="ttname"><a href="__lexer_8c.html#aeab3e8693f54ef46c91a8589f35a60d0">lexer_skip</a></div><div class="ttdeci">void lexer_skip(Lexer *self, const char *charset)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00189">_lexer.c:189</a></div></div>
<div class="ttc" id="__lexer_8c_html_a11463cc517bb27d0b711d6a85f3e57ad"><div class="ttname"><a href="__lexer_8c.html#a11463cc517bb27d0b711d6a85f3e57ad">lexer_next_char</a></div><div class="ttdeci">void lexer_next_char(Lexer *self, const char *charset)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00170">_lexer.c:170</a></div></div>
<div class="ttc" id="__lexer_8c_html_a58cdcf051edb318e0642fd10e1d4f07a"><div class="ttname"><a href="__lexer_8c.html#a58cdcf051edb318e0642fd10e1d4f07a">lexer_next</a></div><div class="ttdeci">void lexer_next(Lexer *self, const char *charset)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00129">_lexer.c:129</a></div></div>
<div class="ttc" id="__lexer_8c_html_a12aff8e140d703e68362dc301a3ade01"><div class="ttname"><a href="__lexer_8c.html#a12aff8e140d703e68362dc301a3ade01">lexer_destroy</a></div><div class="ttdeci">void lexer_destroy(Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00081">_lexer.c:81</a></div></div>
<div class="ttc" id="struct__lexer__t_html"><div class="ttname"><a href="struct__lexer__t.html">_lexer_t</a></div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00007">_lexer.c:7</a></div></div>
<div class="ttc" id="__lexer_8c_html_ad3c560130b4f7c71490ce797ed36e578"><div class="ttname"><a href="__lexer_8c.html#ad3c560130b4f7c71490ce797ed36e578">lexer_next_to</a></div><div class="ttdeci">void lexer_next_to(Lexer *self, const char *charset)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00149">_lexer.c:149</a></div></div>
<div class="ttc" id="__lexer_8h_html"><div class="ttname"><a href="__lexer_8h.html">_lexer.h</a></div><div class="ttdoc">Analizador léxico que lee el flujo de caracteres de entrada y lo transforma en una secuencia de compo...</div></div>
<div class="ttc" id="____bstrlib_8c_html_a840ac32e58f2a82fbf11995caad4ef12"><div class="ttname"><a href="____bstrlib_8c.html#a840ac32e58f2a82fbf11995caad4ef12">btrunc</a></div><div class="ttdeci">int btrunc(bstring b, int n)</div><div class="ttdef"><b>Definition:</b> <a href="____bstrlib_8c_source.html#l00549">__bstrlib.c:549</a></div></div>
<div class="ttc" id="struct__lexer__t_html_ab826cc29e39301e5c610eb5c04b5308c"><div class="ttname"><a href="struct__lexer__t.html#ab826cc29e39301e5c610eb5c04b5308c">_lexer_t::item</a></div><div class="ttdeci">bstring item</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00011">_lexer.c:11</a></div></div>
<div class="ttc" id="struct__lexer__t_html_a849ff3334b6f77aa2862003ca39103fe"><div class="ttname"><a href="struct__lexer__t.html#a849ff3334b6f77aa2862003ca39103fe">_lexer_t::has_current</a></div><div class="ttdeci">bool has_current</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00010">_lexer.c:10</a></div></div>
<div class="ttc" id="__lexer_8c_html_aef5130d55b06d8a9e22a76dab34df192"><div class="ttname"><a href="__lexer_8c.html#aef5130d55b06d8a9e22a76dab34df192">lexer_is_off</a></div><div class="ttdeci">bool lexer_is_off(const Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00119">_lexer.c:119</a></div></div>
<div class="ttc" id="____bstrlib_8c_html_abebe200396d233cc3b732677e17f1087"><div class="ttname"><a href="____bstrlib_8c.html#abebe200396d233cc3b732677e17f1087">bdestroy</a></div><div class="ttdeci">int bdestroy(bstring b)</div><div class="ttdef"><b>Definition:</b> <a href="____bstrlib_8c_source.html#l00996">__bstrlib.c:996</a></div></div>
<div class="ttc" id="__lexer_8c_html_a206000c56ea092f4a7f21696633d05a9"><div class="ttname"><a href="__lexer_8c.html#a206000c56ea092f4a7f21696633d05a9">lexer_skip_to</a></div><div class="ttdeci">void lexer_skip_to(Lexer *self, const char *charset)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00194">_lexer.c:194</a></div></div>
<div class="ttc" id="struct__lexer__t_html_a4f8b893603bd3b5d0bd0d6378f07976c"><div class="ttname"><a href="struct__lexer__t.html#a4f8b893603bd3b5d0bd0d6378f07976c">_lexer_t::is_started</a></div><div class="ttdeci">bool is_started</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00013">_lexer.c:13</a></div></div>
<div class="ttc" id="____bstrlib_8c_html_ab505e4ece683c289cc40bc271a7c7819"><div class="ttname"><a href="____bstrlib_8c.html#ab505e4ece683c289cc40bc271a7c7819">bfromcstralloc</a></div><div class="ttdeci">bstring bfromcstralloc(int mlen, const char *str)</div><div class="ttdef"><b>Definition:</b> <a href="____bstrlib_8c_source.html#l00215">__bstrlib.c:215</a></div></div>
<div class="ttc" id="__lexer_8c_html_ac4bb4b844cd11e0b36321040e45ddb27"><div class="ttname"><a href="__lexer_8c.html#ac4bb4b844cd11e0b36321040e45ddb27">lexer_is_started</a></div><div class="ttdeci">bool lexer_is_started(const Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00111">_lexer.c:111</a></div></div>
<div class="ttc" id="struct__lexer__t_html_abfae665d56d61e1c21831bec369abd34"><div class="ttname"><a href="struct__lexer__t.html#abfae665d56d61e1c21831bec369abd34">_lexer_t::input</a></div><div class="ttdeci">FILE * input</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00008">_lexer.c:8</a></div></div>
<div class="ttc" id="____bstrlib_8c_html_ab21dd77c743df60a682a720a8b981f24"><div class="ttname"><a href="____bstrlib_8c.html#ab21dd77c743df60a682a720a8b981f24">bconchar</a></div><div class="ttdeci">int bconchar(bstring b, char c)</div><div class="ttdef"><b>Definition:</b> <a href="____bstrlib_8c_source.html#l00350">__bstrlib.c:350</a></div></div>
<div class="ttc" id="__lexer_8c_html_a3819e88a54bc68f575d7e9604311bc08"><div class="ttname"><a href="__lexer_8c.html#a3819e88a54bc68f575d7e9604311bc08">lexer_new_item</a></div><div class="ttdeci">static void lexer_new_item(Lexer *self)</div><div class="ttdef"><b>Definition:</b> <a href="__lexer_8c_source.html#l00047">_lexer.c:47</a></div></div>
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